MATLAB: Find the duration of speech

Image Processing Toolboxspeech processing

i have a video or audio with 2 persons speaking… Is it possible to get the

 1.   duration of speech by person1 and person2 separately 
 2.   duration of overlapping speech 
 3.   duration of silence also

from the video or audio input?

Best Answer

Why can't you just threshold the signal and then use regionprops() to find out where the silent regions start and stop? I know you've used regionprops() before.

[silentRegions, numRegions] = y < someThreshold;
labeledRegions = bwlabel(silentRegions);
props = regionprops(labeledRegions, 'PixelList');
for k = 1 : numRegions
    fprintf('Silence region %d is between element %d and %d.\n',...
      k, props(k).PixelList(1), props(k).PixelList(end));
end

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MATLAB: Counting number of repeated elements

You can use regionprops() to get the length, then do something on each set of indexes where the length exceeds 360. If you have the Image Processing Toolbox, here's a start

% Find zeros, convert to binary, then label each region:
[labeledRegions, numRegions] = bwlabel(doubleVector == 0); 
% Measure lengths of each region, and get indexes of each region.
props = regionprops(labeledRegions, 'Area', 'PixelIdxList');
% Loop over all regions, looking for regions that are 360 elements or longer.
for k = 1 : numRegions
    % See if this stretch of zeros is 360 or longer.
    if props(k).Area >= 360
        % This stretch of zeros is 360 or longer.
        theseIndexes = props(k).PixelIdxList;
        % Now do something with these indexes.
    end
end

MATLAB: I am not getting the BoundingBox

See my Image Segmentation Tutorial where I demonstrate that: http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial---blobsdemo--

Best Answer

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MATLAB: Counting number of repeated elements

MATLAB: I am not getting the BoundingBox

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